Automatic drilling and tapping chuck.



No. 687,096. Patented Nov. l9, l90l. T. WIEDEMANN.

AUTOMATIC DRILLING AND TAPPING CHUCK.

(Application filed Nov; 10, 1900.)

(No Model.)

UNITED STATES PATENT. OFFICE. 1

THEODORE 'WIEDEMANN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OFONE-FOURTH TO JULIUS KELLER, OF PHILADELPHIA, PENNSYLVANIA.

AUTOMATIC'DRILLING AND TAFfPlNG CHUCK.

SPECIFICATION forming part of Letters Patent No. 687,096, dated November19, 1901.

' Application filed November 10,1900. Serial No. 36.035. (in model.)

To all whom it may concern; 1

Be it known that LTHEODORE WIEDEMANN, a citizen of the United States,residing in the city and county of Philadelphia,State of Pen nsylvania,have invented a new and useful Improvement in Automatic Drilling andTapping Chucks, of which the following is a'specilication. l i

Myinvent-ion consists-of an improved con- [0 struction of an automaticdrilling and tapping chuck wherein provision is made for antomaticallyreversingthe device and for utilizin g the invention for drilling aswell a'stapping, and means arefurther providedfor removing andreplacingithe loweror tool-holding chuck without necessitating thestopping of the machine. p i J It further consists of novel means forenabling the device when used .for tapping to be automatically reversedaccording to requirements. Y l It further consists of novel details'ofconstruction, all as will be hereinafter fully set forth, andparticularly pointed out in the claims. I l

Figure 1 represents a horizontalrsectional view of an automatic drillingand tapping chuck embodying my invention, the section being taken online L/ 9, Fig. 2. Fig. 2 rep- 3o resents avertical sectional view ofFig. 1, the

section being taken on line w 00, Fig. 1. Fig/ 3 represents aperspective view of the carrier,

carrier-pin, slotted nut, regulating-screw,and its adjunctsin detachedposition. Fig. 4 represents a bottom plan view of the intermediate chuckseen in Fig. 2 in detached position. Fig. 5 represents a section on line2 a, Fig. 4. Fig. 6 represents a horizontal section on line y y, Fig. 2.Fig. 7 represents a vertical sectional view of the lower or tool-holdingchuck V seen in the lower portion of Fig. 2 in detached position.

showing the graduated scale on the lower extension of t-hemain spindleor shaft. 5 Similar numerals of reference indicate corresponding partsin the figures.

Referring to the drawings, 1 designates the casing in which the drivingand reversing mechanism is inclosed.

5o 2 designates a driving-spindle, which may Fig.- 8 represents a sideelevation be connected with a drill-press, boring-mill,

or any other suitable source of motive power, (not shown,) saiddriving-spindle terminat-1 ing at its lower portion in the gear 3, from2 i which latter depend the clutch-pins 4 and 5. 55.

6 designates afpinion or idler which is in mesh with the gear3and is.suitably mounted within the casing 1 upon the shaft 7, the upper andlower extremities'of the latter having suitable bearingsf'in the upperand lower 1 portion of said casing.

8 designates an idler mounted on the'lower portion of the shaft 7. andin mesh with the idler 9, which latter is suitably mounted on thestud10, it being understood that the idler 8 is'of. less diameter than theidler 9.

' 11 designates a nut mounted on the stud 10 and adapted to secure thesame in proper position. The idler 9 isin mesh with the reversing-gear12, which latter is shown in dot- 7o tedlines in Fig. 1 and la the lowerportion of the casing seen in Fig. 2, said reversing gear 12 being oflesser diameter than the gear 3.

- 13 designates clutch pins which project upwardly from the reversingear12 and areada ptedto contact at the proper intervals, as

will be hereinafter explained, with the extensions 1-1, which are two innumber in thepresentinstance, and depend from the underside of thecarrier 15, the latter, as will be .un'der- 8o stood fromFigs.2 and 3,beingcomposedof a ring 16, having projecting from the top or uppersurface thereof {the extensions 17, which are adapted to coactwith theclutch-pins t and 5 at the proper intervals, as will be explained. g i-18designa tes the carrier-pi n, which extends transversely of thering16, composing the car.-

rier, and passes through the slotted nut 19, the lower portion'of thelatter being inter '90 nally threaded and adapted to engage the.threaded portion of the regulating-screw 20," which latter has on itslower extremity the head 21, it being noted that the upper portion 22 ofsaid regulating-screw is unthreaded and 5 adapted to contact withthecarrier-pin 18at the proper intervals.

23 designates the mainspindle or shaft, which is located within thedriving-spindle 2 and extends downwardly through the carrier I00 fromFig. 8, so that the relative position of the chuck 28 to said spindlemay be readily ascertained, said chuck 28 having the squared opening '29therein, into which the squared extension 26 is adapted to be inserted,so that said chuck 28 is capable of longitudinal movement relative tothe lower extension of the main spindle 3. has a partition 30 in itslower portion, through which passes the lower end ofthe regulatingscrew20, the under side of said partition being provided with a recess 31,which receives the head 21 on the lower extremity of saidregulating-screw, said head being held in position by means of the plate32 and the screws or similar fastening devices 33.

34 designates a recess in the lower portion of the intermediate chuck28, which is provided on its inner periphery with the carrierpins 35,which project toward each other and are adapted to engage the walls ofthe T- shaped recesses 36, which are located in the upper outer portionsof the lower or tapping or drilling chuck 37, the latter being providedwith asocket 38 for the reception of the shank of the tap, drill, orother tool which is employed.

3O designates a plunger which is seated in a recess in the upper portionof the chuck 28 and is adapted to retain said chuck in its uppermostposition, said plunger being retained in place by means of the spring40,which is held in position by the plug or closure 41.

It will be first understood that the tool can only be operated in a.vertical position with the drivingspindle at the upper side and the rwill advance before the carrier is disengaged tapping-chuck at thebottom side.

The operation is as follows: When the parts are in the position shown inFig. 2, assuming that a tap is inserted in the lower chuck 37, thedevice is about. to tap, an opening. It is understood that the spindle 2is rotated to the right, and consequently the pins 4 and 5, carried bythe gear 3, engage the extensions 17 of the carrier 15 and turn-the mainspindle 23 also to the right, it being understood that the idlers 6, 8,and 9, as wellas the reversinggear 13, turn free. As the tap advances inthe work, it being understood that there is sufficient friction betweenthe pi'ns4 and 5 and the extensions 17 to hold these parts ineagagement, the chucks 37 and 28 advance with the tap, the chuck 28sliding upon the square portion of the main spindle, while theregulating-screw, which moves with said chuck 28, draws the nut 19downwardly with it until the upper wall 19 of the slot in said nut 19contacts with the pin 18, whereupon a further advance of the tap andparts connected therewith will cause said nut 13 to The intermediatechuck 28 draw the carrier 15 downwardly to disengage the clutch-pins 4and 5 and the extensions 17.

This will throw the extensions 14 on the lower end of the carrier 15into engagement with the clutch-pins 13, and since the reversing-gear 12is rotating to the left in consequence of the train of gearing betweenit and the gear 3 the tap and related parts are turned to the left towithdraw said tap from the work. The upward movement of the tapcontinues until its threads are disengaged from the threads of theopening; but this does not remove the lower endof the tap clear of thework, so that the latter can be shifted, as said tap will continue torotate to the left, but with its threads disengaged from the threads ofthe opening, until the chuck 28 is lifted, so that the plunger 39 canengage the recess in the square portion 26 of the spindle. The operatordoes this by lifting the chuck 28, and when this plunger 39 engages saidrecess the carrier 15 stands intermediate the clutch-pins 4 and 5 and13, the extent to which the chuck 28 and parts connected therewith arelifted being sufficient to raise the lower end ofthe tap above the uppersurface of the work. then be shifted to bring a new opening in positionto be tapped, and when it is desired to again start the tool the partsare again lifted by means of the chuck 28 to bring the carrier The workcan 15 to the position shown in Fig. 2, whereupon the operation abovedescribed is repeated.

It is understood that the spindle 23 is rotated by reason of theengagement of the pin 18 of the carrier, which passes through slots inthe sides of said spindle coincident with the slots in the nut 19.

It is understood that by turning the regulating-screw in the mannerdescribed the nut 19 can be shifted so as to regulate the extent towhich the slot therein extends above the pin 18, and thus regulate thedistance the tap from the gear 3 by reason of the engagement between thepin 18 and the upper wall 19 of said slot. By reason ofthe square orpoly onal shape of the contact-surface of the extension 26 and theopening 29 it will be seen that by means of the graduated scale 27 onsaid squared extension the intermediate chuck 28 can be set to run a tapto any desired depth.

The head 21 of the screw 20 is provided with a square or polygonalopening or socket, as indicated in dotted lines in Fig. 2, for theinsertion of a suitable wrench, whereby said screw may be adjustedaccording to the scale 27, and as said screw, its head 21, and plate 32are fastened to the chuck 28 the scale can be readily read above theupper extremity of the chuck 28.

By the employment of the T-shaped slot or recess 36 in the lower chuck37it will be apparent that I can quickly bring the chuck into positionor interchange the tapping-chuck and the drilling-chuck, to which latterfeature I desire to call special attention, since my in- IIO vention canbe used for drilling as well as tapping, as will be apparent to thoseskilled in the art, and the lower chuck 37 can be removed and replacedwithout necessitating stoppage of the machine.

It will be apparent that changes may be made by those skilled in the artwhich will come within the scope of my invention, and Ido not thereforedesire to be limited in every instance to the exact construction I haveherein shown and described.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is

1. In an automatic drilling and tapping chuck, a casing, adriving-spindle, a gear carried thereby, a reversing-gear, gearinginterposed between said gears, the main spindle havinga scale, areciprocatory carrier around said main spindle for rotating the latter,a regulating-screw and a chuck connected with said regulating-screw.

2. Inan automatic drilling and tapping chuck, a main spindle having asquared extension at the lower portion thereof, means for effecting therotation of said main spindle, and a chuck carried by said extension,the extension having a scale thereon.

3. In an automatic drilling and tapping chuck, a main spindle, means forrotating the same, means for automatically effecting the rotationthereof in a reverse direction, an intermediate chuck carried upon anextension of said main spindle, a regulating-screw engaged with saidchuck and with the reciprotatory carrier of said reversing means and alower or tool-holding chuck adapted to be carried by said intermediatechuck.

at. In an automatic drilling and tapping,

chuck, a casing, a driving-spindle located therein and having a gear onits upper portion, a reversing-gear located within said casing, gearingintermediate said gears, clutchpins projecting from each of said gearstoward each other, a carrier located intermediately of said clutch-pins,a chuck for holding a tap or drill and means embodying aregulating-screw connected with the chuck and a pin movable with thecarrier and resting on said screw for imparting rotation from saidcarrier to said chuck, said pin being movable independent of thespindle.

5. In an automatic drilling and tapping chuck, a main spindle, means forrotating said main spindle, means for automatically effectin g thereversing thereof, a squared extension on the lower portion of said mainspindle and a chuck carried on said extension, thelatter having a scaleor gradnations thereon.

6. In an automatic drilling and tapping chuck, a chuck, means forrotating the same, means for automatically reversing the rotation ofsaid chuck, a recess in the lower portion of said chuck, pins projectingdiametrically toward each other in said recess and a lower ortoolholding chuck, the latter being provided on its opposite portionswith a T- ,pins.

shaped recess adapted to be engaged by said thereof, a slotted nut, aregulating-screw en-- gaging the lower portion thereof, a main splndle'inclosing said nut and regulating-screw, an intermediate chuck rotatedby said main spindle and rotatably mounted on the said.' I

screw and a tool-chuck rotated by said inter-' mediate chuck.

S. In an automatic drilling and tapping U chuck, a casing, adriving-spindle having a gear thereon, a reversing-gear located withinsaid casing, gearing intermediate said gears;

clutch-pins projecting'toward each other from said gears, a carrierlocated intermediatelyv of said gears and provided with extensions onits upper and lower surface adapted to coact with said clutch-pins, amain spindle, a slotted nut contained within said main spindle,

a carrier-pin extending transversely on said tension on the lowerportion of said main spindle, an intermediate chuck carried upon saidextension and a lower tool-holding chuck carried by said intermediatechuck.

9. In an automatic drilling and tapping chuck, a main spindle, means forrotating the same, means for automatically reversing the direction ofrotation of said main spindle, an intermediate chuck adjustable on themain spindle, and a chuck carried by the latter and adapted to rotate asuitable tool, and means for positively driving said intermediate chuck.

10. In an automatic drilling and tapping chuck, ajmain spindle, meansfor rotating the same, means for automatically reversing the directionof rotation of said main spindle, and a chuck carried by the latter andadapted to rotate a suitable tool, in combination with a scale locatedin an extension of said main spindle, and an intermediate chuckadjustable relatively to said scale 11. In an automatic drilling andtapping chuck, a casing, a driving-spindle located therein and carryinga gear, a reversing-gear in said casing, means for actuating said gears,a tool-holding chuck indirectly carried by said spindle, and meansintermediate said gears for actuating said chuck, an intermediate chuckand means forits adjustment to adapt it to run a tap of predetermineddepth.

12. In an automatic drilling and "tapping chuck, a casing, adriving-spindle located therein and carrying a gear, a reversing-gear insaid casing, means for actuating said gears, a tool-holding chuckindirectly carried by said spindle, and means independent of andintermediate said gears for. actuating said chuck, in combination withother mechanism intermediate said gears for automatically reversing thedirection of rotation of said chuck, an intermediate chuck and a scalecooperating therewith.

13. In an automatic drilling and tapping chuck, an intermediate chuck,means for rotating the same, a scale located in proximity to said chuck,and means for adjusting said chuck with respect to said scale.

14:. In an automatic drilling and tapping chuck, an intermediate chuck,means for rotating the same, a scale located in proximity to said chuck,and means for adjusting said chuck with respect to said scale, incombination with a tool-holding chuck having recesses therein and pinscarried by said intermediate chuck and adapted to engage said recesses.

15. In an automatic drilling and tapping chuck, an intermediate chuck,means for rotating the latter, a tool-holding chuck, T- shaped recessesin the latter and pins carried by said intermediate chuck and adapted toengage said recesses.

16. In an automatic drilling and tapping chuck, a main spindle, meansfor rotating said main spindle, means for automatically eifecting thereversing thereof, an extension on said main spindle, a chuck carried onsaid extension, the extension having a scale thereon, and means foradjusting said chuck rela- 'tive to said scale.

17. In an automatic drilling and tapping chuck, a driving-spindlelocated therein and carrying a gear, a reversing-gear in said casing,means for actuating said gears, pins projecting from said gears and aregulatingscrew, a slotted nut carried thereby, a pin Working in theslot of the nut, and a carrier movable with said pin and having meansactuated by said pin for rotating a tap or drill.

18. In an automatic drilling and tapping chuck, a driving-spindlelocated therein and carrying a gear, a reversing-gear in said casing,means for actuating said gears, pins projecting from said gears and aregulatingscrew, a slotted nut movable therewith, a pin working in theslot of the nut, and a carrier movable with said pin and having meansactuated by said pins for rotating a tap or drill and for alsoautomatically eifecting the reversing thereof.

19. In an automatic drilling and tapping chuck, a main spindle, adriving-spindle, located therein, a carrier within said casing, meansfor rotating said carrier in either direction, a chuck, an intermediatechuck connected with said chuck and slidable on an extension of the mainspindle and powertransmission devices intermediate said intermediatechuck and carrier.

THEODORE WIEDEMANN.

Witnesses: JOHN A. WIEDERSHEIM, O. D. MCVAY.

